I have two objects, one reference to the other. I would like to be able to using something akin to Player.Inventory.Contain(Item.Attributes == "Sharp"). My goal is to be able to scan a player inventory f,c#,linq"/>

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I have two objects, one reference to the other. I would like to be able to using something akin to Player.Inventory.Contain(Item.Attributes == "Sharp"). My goal is to be able to scan a player inventory f

c# - 在所有类列表中搜索匹配值

I have two objects, one reference to the other. I would like to be able to using something akin to Player.Inventory.Contain(Item.Attributes == "Sharp"). My goal is to be able to scan a player inventory f

问题描述

I have two objects, one reference to the other. I would like to be able to using something akin to Player.Inventory.Contain(Item.Attributes == "Sharp"). My goal is to be able to scan a player inventory for all the items attributes and check if one or many or none are matching. This way I can dynamically change what happens depending on a character inventory.

class Player
{
    public string Name { get; set; }
    public List<Item> Inventory { get; set; }

    public Player()
    {
        Inventory = new List<Item>();
    }
}

And:

public class Item
{
    public int ID { get; set; }
    public string Name { get; set; }
    public bool IsCarried { get; set; }
    public List<string> Attributes { get; set; }

    public Item(int id, string name)
    {
        ID = id;
        Name = name;
        Attributes = new List<string>();
    }
    public Item(int id, string name, bool iscarried)
    {
        ID = id;
        Name = name;
        IsCarried = iscarried;
        Attributes = new List<string>();
    }
}

Grouping SpriteKit nodes, and zPosition controll

I am using SpriteKit. For character with parts of multiple SKSpriteNode, I'd like to controll overlap of nodes for each character.

For example, the character consists of notes and order of parts as follows. Since addChild is done in order from the top, the head is displayed at the top in the appearance (it is forced by zPosition because occasionally collapses)

Body (z = 100)
    Leg (z = +1)
    Hand (z = +2)
    Head (z = +3)

If it overlaps with other characters, we will treat it so that there is a depth on the 2D screen below.

HumanA.zPosition = -humanA.position.y
HumanB.zPosition = -humanB.position.y

In the case of humanA.position.y=-101, humanB.position.y=-100, humanB is before humanA. But humanA's head (z = -98) is before humanB's leg (z = -99).

Ideally, if humanB is in front of humanA, I would like to make all parts of humanB ahead of humanA.

Please help me.

Reference site https://developer.apple.com/documentation/spritekit/sknode

Thank you.

标签： c#linq

解决方案

适当的 LINQ 运算符是.Any(). IE

player.Inventory.Any(item => item.Attributes.Contains("Sharp"))

请注意，如果属性数量变大，性能会很差。您应该更喜欢HashSet<string>而不是List<string>for Attributes，或者Dictionary<string,int>如果相同的属性可以出现多次。

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